Pass the F5 F5-CA F5CAB1 Questions and answers with CertsForce

When a TMOS ISO file is transferred to/shared/images/, the BIG-IP automatically performs a validation step:

Checksum Verification

Before the image becomes visible in the GUI, the systemverifies the internal checksumembedded inside the ISO.

This ensures:

The file was fully transferred

The image is not corrupted

It matches the official F5 release signature

Only after passing this verification does the GUI display the ISO under “Available Images.”

Why the other options are incorrect:

A. Reboot into a new partition

No reboot occurs simply from uploading an image.

C. Copying into /var/local/images/

This directory isnotused for ISO storage.

All valid images remain in/shared/images/.

Thus, the correct system action ischecksum verification.

The exhibit shows the configuration of aSelf IPwith:

Port Lockdown: Allow Custom

ACustom Listthat includes the following TCP ports:

443

22

Meaning of these ports:

TCP 443→ HTTPS (TMUI — web-based management)

TCP 22→ SSH (command-line remote access)

No other TCP, UDP, or protocol entries are listed; therefore, only these two services are allowed to reach the BIG-IP via this Self IP.

Evaluating the answer choices:

Option

Service

Port

Allowed?

FTP

TCP 21

Not listed

Not allowed

SSH

TCP 22

Listed

Allowed

Telnet

TCP 23

Not listed

Not allowed

Thus,SSHis the only traffic permitted through this Self IP configuration.

The BIG-IP has two distinct planes:

Management-plane→ handled entirely by the management interface (MGMT)

Data-plane (TMM)→ handles Self IPs, VLAN interfaces, and traffic processing

To capture traffic on the management interface, only the management-side NICs may be used:

mgmt→ Logical name for the management interface

eth0→ Physical Linux interface mapped to the management port on most BIG-IP platforms

Both of these correctly capture inbound/outbound WebUI (HTTPS/443) traffic on the management port.

Why the correct answers are A and B

A. tcpdump -i eth0 -n port 443

On BIG-IP appliances and VMs, the management port maps toeth0at the Linux OS level.

Capturing on eth0 correctly shows HTTPS traffic to the WebUI.

B. tcpdump -i mgmt -n port 443

mgmtis the BIG-IP alias for the management interface.

This is thepreferredand most explicit capture interface for management-plane packet captures.

Why the other options are incorrect:

C. tcpdump -i 0.0

Interface0.0is the TMM switch interface used for data-plane packet captures.

Itdoes NOTcapture management-plane traffic.

D. tcpdump -i tun0

Used for tunnel interfaces (IPsec, VXLAN, etc.)

Not related to management access.

E. tcpdump -i management

There isnointerface named management on BIG-IP.

The correct names are mgmt or eth0.